Data transmission and apparatus

Abstract

Media access control MAC payloads corresponding to a plurality of receiving devices are encapsulated in one MAC packet data unit (PDU), where the MAC PDU includes a header, the MAC payloads and identification information of each receiving device in the plurality of receiving devices; and the header includes a plurality of subheaders, the plurality of subheaders is subheaders respectively corresponding to a MAC payload corresponding to each receiving device, the MAC payload corresponding to each receiving device includes a MAC control element (CE) and/or a MAC service data unit (SDU), and the identification information is used for identifying each receiving device. In the foregoing solutions, transmission of a MAC PDU during multi-user cooperated communication is implemented.

What is claimed is: 
     
       1. A method, comprising:
 receiving, by a first receiving device, a media access control (MAC) packet data unit (PDU), the MAC PDU comprising a MAC header followed by a plurality of MAC payloads, wherein the MAC header comprises a plurality of contiguous subheaders, each subheader comprises a respective identification information of each receiving device in a plurality of receiving devices, wherein the first receiving device is comprised in the plurality of receiving devices, each MAC payload of the plurality of MAC payloads corresponds to a receiving device of the plurality of receiving devices, and each subheader of the plurality of contiguous subheaders corresponds to a respective MAC payload of the plurality of MAC payloads, and wherein the plurality of MAC payloads are contiguous without any intervening MAC header between adjacent MAC payloads, each MAC payload of the plurality of MAC payloads comprises at least one kind of a MAC control element (CE) or a MAC service data unit (SDU), and a subheader corresponding to a MAC CE has a different format than a subheader corresponding to a MAC SDU; and 
 obtaining, by the first receiving device from the received MAC PDU, at least one MAC payload corresponding to the first receiving device, wherein identification information in the received MAC PDU that corresponds to the at least one MAC payload identifies the first receiving device among the plurality of receiving devices. 
 
     
     
       2. The method according to  claim 1 , wherein a plurality of identification fields of the MAC PDU carries the identification information of each receiving device of the plurality of receiving devices, and each receiving device of the plurality of receiving devices corresponds to a respective identification field of the plurality of identification fields. 
     
     
       3. The method according to  claim 2 , wherein each identification field of the plurality of identification fields comprises a first field or a last field in a respective plurality of fields, each respective plurality of fields corresponding to one or more MAC payloads that correspond to a same respective receiving device of the plurality of receiving devices. 
     
     
       4. The method according to  claim 1 , wherein:
 the plurality of MAC payloads in the MAC PDU are encapsulated in a plurality of groups, each group of the plurality of groups is in a one-to-one correspondence to a respective receiving device of the plurality of receiving devices, and wherein, for each receiving device of the plurality of receiving devices, all MAC payloads corresponding to the respective receiving device are encapsulated in one group, and positions of MAC payloads corresponding to the respective receiving device are continuous. 
 
     
     
       5. The method according to  claim 4 , wherein:
 for each receiving device of the plurality of receiving devices, the respective identification information of the respective receiving device comprises a respective MAC CE corresponding to the respective receiving device, wherein the respective MAC CE corresponding to the respective receiving device bears a respective identifier that uniquely identifies the respective receiving device among the plurality of receiving devices; and 
 for each MAC CE in the MAC PDU, a position of the respective MAC CE in all the MAC payloads corresponding to a corresponding receiving device indicates a position of all the MAC payloads corresponding to the corresponding receiving device in the MAC PDU. 
 
     
     
       6. The method according to  claim 5 , wherein, for each receiving device, the respective MAC CE bearing the respective identifier of the respective receiving device is located at a first or last one of all the MAC payloads corresponding to the respective corresponding receiving device. 
     
     
       7. The method according to  claim 1 , wherein the identification information comprises a value represented by a reserved bit, and the value represented by the reserved bit uniquely identifies a receiving device of the plurality of receiving devices. 
     
     
       8. An apparatus, comprising:
 a processor; 
 a non-transitory storage medium comprising executable instructions which, when executed by the processor, cause the apparatus to:
 receive a media access control (MAC) packet data unit (PDU), the MAC PDU comprising a MAC header followed by a plurality of MAC payloads, wherein the MAC header comprises a plurality of contiguous subheaders, each subheader comprises a respective identification information of each receiving device in a plurality of receiving devices, wherein a first receiving device is comprised in the plurality of receiving devices, the apparatus is comprised in the first receiving device, each MAC payload of the plurality of MAC payloads corresponds to a respective receiving device of the plurality of receiving devices, and each subheader of the plurality of contiguous subheaders corresponds to a respective MAC payload of the plurality of MAC payloads, and wherein the plurality of MAC payloads are contiguous without any intervening MAC header between adjacent MAC payloads, each MAC payload of the plurality of MAC payloads comprises at least one kind of a MAC control element (CE) or a MAC service data unit (SDU), and a subheader corresponding to a MAC CE has a different format than a subheader corresponding to a MAC SDU; and 
 obtain, from the received MAC PDU, at least one MAC payload corresponding to the first receiving device, wherein identification information in the received MAC PDU that corresponds to the at least one MAC payload identifies the first receiving device among the plurality of receiving devices. 
 
 
     
     
       9. The apparatus according to  claim 8 , wherein a plurality of identification fields of the MAC PDU carries the identification information of each receiving device of the plurality of receiving devices, and each respective receiving device of the plurality of receiving devices corresponds to a respective identification field of the plurality of identification fields. 
     
     
       10. The apparatus according to  claim 9 , wherein each identification field of the plurality of identification fields comprises a first field or a last field in a respective plurality of fields, each respective plurality of fields corresponding to one or more MAC payloads that correspond to a same respective receiving device of the plurality of receiving devices. 
     
     
       11. The apparatus according to  claim 8 , wherein:
 the plurality of MAC payloads in the MAC PDU are encapsulated in a plurality of groups, each group of the plurality of groups is in a one-to-one correspondence to a respective receiving device of the plurality of receiving devices, and wherein, for each receiving device of the plurality of receiving devices, all MAC payloads corresponding to the respective receiving device are encapsulated in one group, and wherein positions of MAC payloads corresponding to the respective receiving device are continuous. 
 
     
     
       12. The apparatus according to  claim 11 , wherein:
 for each receiving device of the plurality of receiving devices, the respective identification information of the respective receiving device comprises a respective MAC CE corresponding to the respective receiving device, wherein the respective MAC CE corresponding to the respective receiving device bears a respective identifier that uniquely identifies the respective receiving device among the plurality of receiving devices; and 
 for each MAC CE in the MAC PDU, a position of the respective MAC CE in all the MAC payloads corresponding to a corresponding receiving device indicates a position of all the MAC payloads corresponding to the corresponding receiving device in the MAC PDU. 
 
     
     
       13. The apparatus according to  claim 12 , wherein, for each receiving device, the respective MAC CE bearing the respective identifier of the respective receiving device is located at a first or last one of all the MAC payloads corresponding to the respective receiving device. 
     
     
       14. The apparatus according to  claim 8 , wherein the identification information comprises a value represented by a reserved bit, and the value represented by the reserved bit uniquely identifies a receiving device of the plurality of receiving devices. 
     
     
       15. A non-transitory computer-readable storage medium comprising instructions which, when executed by a first receiving device, cause the first receiving device to:
 receive a media access control (MAC) packet data unit (PDU), the MAC PDU comprising a MAC header followed by a plurality of MAC payloads, wherein the MAC header comprises a plurality of contiguous subheaders, each subheader comprises a respective identification information of each receiving device in a plurality of receiving devices, wherein the first receiving device is comprised in the plurality of receiving devices, each MAC payload of the plurality of MAC payloads corresponds to a respective receiving device of the plurality of receiving devices, and each subheader of the plurality of contiguous subheaders corresponds to a respective MAC payload of the plurality of MAC payloads, and wherein the plurality of MAC payloads are contiguous without any intervening MAC header between adjacent MAC payloads, each MAC payload of the plurality of MAC payloads comprises at least one kind of a MAC control element (CE) or a MAC service data unit (SDU), and a subheader corresponding to a MAC CE has a different format than a subheader corresponding to a MAC SDU; and 
 obtain, from the received MAC PDU, at least one MAC payload corresponding to the first receiving device, wherein identification information in the received MAC PDU that corresponds to the at least one MAC payload identifies the first receiving device among the plurality of receiving devices. 
 
     
     
       16. The non-transitory computer-readable storage medium according to  claim 15 , wherein a plurality of identification fields of the MAC PDU carries the identification information of each receiving device of the plurality of receiving devices, and each respective receiving device of the plurality of receiving devices corresponds to a respective identification field of the plurality of identification fields. 
     
     
       17. The non-transitory computer-readable storage medium according to  claim 16 , wherein each identification field of the plurality of identification fields comprises a first field or a last field in a respective plurality of fields, each respective plurality of fields corresponding to one or more MAC payloads that correspond to a same respective receiving device of the plurality of receiving devices. 
     
     
       18. The non-transitory computer-readable storage medium according to  claim 15 , wherein:
 the plurality of MAC payloads in the MAC PDU are encapsulated in a plurality of groups, each group of the plurality of groups is in a one-to-one correspondence to a receiving device of the plurality of receiving devices, and wherein, for each receiving device of the plurality of receiving devices, all MAC payloads corresponding to the respective receiving device are encapsulated in one group, and wherein positions of MAC payloads corresponding to the respective receiving device are continuous. 
 
     
     
       19. The non-transitory computer-readable storage medium according to  claim 18 , wherein:
 for each receiving device of the plurality of receiving devices, the respective identification information of the respective receiving device comprises a respective MAC CE corresponding to the respective receiving device, wherein the respective MAC CE corresponding to the respective receiving device bears a respective identifier that uniquely identifies the respective receiving device; and 
 for each MAC CE in the MAC PDU, a position of the respective MAC CE in all the MAC payloads corresponding to a corresponding receiving device indicates a position of all the MAC payloads corresponding to the corresponding receiving device in the MAC PDU. 
 
     
     
       20. The non-transitory computer-readable storage medium according to  claim 19 , wherein the identification information comprises a value represented by a reserved bit, and the value represented by the reserved bit uniquely identifies a receiving device of the plurality of receiving devices.